Major Questions, Nondelegation, and the Section 338 Tariffs Against Canada

Reason · collected 2026-09-14 · by Ilya Somin
Read the original at Reason ↗

Summary

Law professors discuss how President Trump's use of Section 338 tariffs against Canadian imports may be illegal based on the major questions and nondelegation doctrines. The article argues that Section 338, which has never been used before, could allow for unlimited presidential discretion in imposing tariffs, violating principles of clear congressional authorization for significant economic decisions. This critique is bolstered by recent cases where similar expansive interpretations of executive power were struck down due to lack of clear legislative mandate and excessive delegation of authority.
Written by the local model on 2026-09-14, using this article's own text rather than the other coverage of the same event (that is the story summary below).

Signals How these are calculated →

Claims extracted
28
claim-shaped sentences
Uncertain
7%
2 of 28 hedged
Leaning
Leans strongly left
of the writing, not the subject
Correction & hedging signals
91.5
corrections and hedging in what we collected; not a measure of accuracy
Outlets on this story
1
Politics
Narrative spread
1
articles carrying this framing
Analyzed 2026-09-14 · how these are computed

AI analysis (generated at analysis time, not now)

Story summary

In a move reminiscent of past economic crises, President Trump imposed Section 338 tariffs against various Canadian imports, expanding the restrictions to include categorical bans on certain products. This action is legally questionable given that Section 338 was part of the controversial Smoot-Hawley tariff act from 1930, which worsened the Great Depression. Experts argue that Trump's tariffs may be illegal both because later legislation might have superseded Section 338 and due to their failure to meet the specific requirements laid out in Section 338 itself. Notably, legal scholars contend that these actions undermine the major questions and nondelegation doctrines by allowing a president excessive power over international trade without clear congressional authorization.

Written for “US Tariff Policy Against Canada” on 2026-09-14, grounded in this article and the 0 other(s) covering the same event.
Why this leaning score
The article's own words the score was based on. Each is quoted verbatim and was checked against the article text before being stored, so you can find it in the original.
Score -0.65 Confidence high 1 quote(s) discarded as not found in the article
Leaning score -0.65 for article 8844 (high confidence, 2 verified quotes) · logged 2026-09-14

Story

📰 US Tariff Policy Against Canada
Politics · 1 article(s) covering the same event. This is the one the site leads with.

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Compared with similar articles

This article reads leans strongly left and hedges 7% of its claims. Each row says how that neighbour differs.
National Post
⚖️ Leans right further right than this 🔴 15% hedged 5 of 33 📰 publisher trust 96
“The articles discuss different aspects of U.S.-Canada trade relations and do not describe the same specific incident.”
National Post
⚖️ leaning not scored 🔴 40% hedged 2 of 5 📰 publisher trust 96
“The articles discuss different aspects of the trade conflict between Canada and the U.S., with Article A focusing on broader economic realities and emotions in dealing with Trump, while Article B focuses specifically on legal analysis of Section 338 tariffs.”
TIME
⚖️ leaning not scored 🔴 15% hedged 6 of 41 📰 publisher trust 95
“While both articles discuss tariffs imposed by the U.S. against Canada, Article A focuses on the immediate impact and implementation of tariffs following failed trade talks, while Article B discusses the legality and historical context of Section 338 tariffs, indicating a different aspect or phase of the broader issue.”
The Bulwark
⚖️ Leans strongly left 🔴 5% hedged 1 of 19
“Article A discusses the impact of Trump's tariffs on workers in Detroit, while Article B provides a legal analysis of the Section 338 tariffs imposed by Trump. They do not describe the same specific incident.”

Publisher

Reason · 110 article(s) · 1 correction(s) detected
Running correction rate · 1 correction(s)
2026-09-05
Lawyers' Responsibility for Hallucinations in Briefs That They Sign

Who wrote this

Ilya Somin
3 article(s) here · 1 carrying a prediction
🔮 In this post, I will explain how the legal case against these actions is bolstered by the major questions and nondelegation doctrines.
🔮 It requires action by the States' "chief election official[s]" and its policy justification is "protect[ing] the integrity of federal elections…."To the extent that appellants argue that we should read statutes authorizing the Postal Service to issue general postal regulations as supplying the necessary congressional authorization for the Final Rule, see 39 U.S.C. § 401(2) (authorizing USPS to make "such rules and regulations, not inconsistent with this title, as may be necessary in the execution of its functions"); id. § 401(10) (authorizing USPS to exercise "all other powers incidental, necessary, or appropriate to the carrying on of its functions or the exercise of its specific powers"); id. § 404(a)(1) (conferring on USPS the power "to provide for the collection, handling, transportation, delivery, forwarding, returning, and holding of mail, and for the disposition of undeliverable mail")
🔮 I expect there will be legal challenges to these tariffs, and those challenges will deserve to prevail.
More on this subject from Ilya Somin
All 3 articles by Ilya Somin →

Topics

Canadian Section 338 Smoot-Hawley Trump the Great Depression

Subjects

Trump PERSON · 9× Canadian NORP · 3× Harrell PERSON · 2× Hillman PERSON · 2× Congress ORG · 1× Georgetown University ORG · 1× Hoover Institution ORG · 1× Jennifer Hillman PERSON · 1× Peter Harrell PERSON · 1× Philip Zelikow PERSON · 1×

Narrative

Since the Supreme Court issued that decision, Trump has repeatedly tried to use other legislation to achieve the same sweeping power: Section 122 of the Trade Act of 1974 (invalidated by the US Court of International Trade, though the case is on appeal), Section 301 of that same act (the issue is now being litigated), and now Section 338.
framing: assertive · carried by 1 article(s) · first seen 2026-09-14
🔮 In this post, I will explain how the legal case against these actions is bolstered by the major questions and nondelegation doctrines.

Claims (28 extracted, 2 hedged)

Mostly law professors | Sometimes contrarian | Often libertarian | Always independent I have previously written about Trump's harmful and illegal imposition of Section 338 tariffs against various Canadian imports, and his recent expansion of those actions to include categorical bans on some Canadian products. asserted
I → write → products
In this post, I will explain how the legal case against these actions is bolstered by the major questions and nondelegation doctrines. asserted
case → explain → questions
Section 338 was part of the infamous Smoot-Hawley tariff act of 1930, which gravely exacerbated the Great Depression. asserted
which → exacerbate → Depression
There is a strong case that Trump's Section 338 tariffs are illegal both because Section 338 (which has never been used previously) was superseded by later legislation, and because Trump's tariffs do not meet the textual requirements of Section 338. asserted
tariffs → be → Section
But assume it is unclear whether Section 338 has been superseded and whether the Trump tariffs on Canadian imports meet the requirements emphasized by Harrell and Hillman: that Section 338 tariffs must be in response to foreign trade polices that "discriminate" against US goods, and must "offset" those discriminatory policies. uncertain
that → assume → policies
In that event, the major questions doctrine (MQD) weighs against Trump's position. asserted
doctrine → weigh → position
MQD requires Congress to "speak clearly" when authorizing the executive to make decisions of "vast economic and political significance." asserted
MQD → require → significance
It played a major role in litigation against Trump's massive International Emergency Economic Powers Act (IEEPA) tariffs. asserted
It → play → tariffs
Bot the US Court of Appeals for the Federal Circuit (which has jurisdiction over all US tariff cases), and three Supreme Court justices struck down those tariffs in large part based on MQD. asserted
justices → have → MQD
Under the administration's interpretation of Section 338, it can be used to impose virtually unlimited tariffs against goods from almost any trading partner, so long as that government imposes any restrictions at all on American imports. asserted
government → use → imports
They would not have to be meaningfully discriminatory, and the Section 338 tariffs would not have to be "offsetting" in the sense of closely calibrated to the trading-partner restrictions they are supposed to be countering. asserted
they → have → restrictions
That kind of sweeping discretion over tariffs creates an obvious major question, inasmuch as it gives the president vast power over the US and world economies. asserted
it → create → US
And that power would not be limited to just US-Canada trade, though even the latter is extremely important, given that Canada is one of our biggest trading partners and the two economies are closely intertwined in many ways. asserted
economies → limit → ways
Trump's recent expansion of Section 338 restrictions further accentuates the "major" nature of the issues at stake. asserted
expansion → accentuate → stake
He has now used Section 338 to ban some imports entirely, as opposed to "merely" imposing tariffs. asserted
He → use → tariffs
Under the administration's interpretation of Section 338, the power to embargo goods would also be nearly unlimited, so long as the trading partner in question imposes at least some constraints on US imports, and doesn't lift them in response to initial Section 338 actions. asserted
partner → embargo → actions
And, as the analyses by Zelikow and Harrell and Hillman show, it is at the very least far from clear that Section 338 is still in force, and that it gives Trump the sweeping power he claims. uncertain
he → show → power
If courts conclude that Section 338 does somehow authorize Trump's actions, even in spite of MQD, they should strike it down under the nondelegation doctrine, which limits delegation of legislative power to the executive. asserted
which → conclude → executive
As the Supreme Court emphasized in the IEEPA case, tariffs are a congressional power, not an executive one. asserted
tariffs → emphasize → case
The power to ban imports entirely is also a congressional power, part of the authority to regulate international commerce. asserted
power → ban → commerce
But last year's decision in FCC v. Consumers' Research held that delegations of the power to impose taxes (including, presumably, tariffs) must have a clear floor and ceiling and that "[t]he guidance needed is greater when an agency action will affect the entire national economy than when it addresses a narrow, technical issue." asserted
it → hold → issue
And the authority claimed by the administration is obviously one that affects the "entire national economy." asserted
that → claim → economy
As the Supreme Court emphasized in the IEEPA case, the president is not supposed to have the power to "impose tariffs on imports from any country, of any product, at any rate, for any amount of time." asserted
president → emphasize → time
Trump's approach to Section 338 would give him exactly that. asserted
approach → give → that
Since the Supreme Court issued that decision, Trump has repeatedly tried to use other legislation to achieve the same sweeping power: Section 122 of the Trade Act of 1974 (invalidated by the US Court of International Trade, though the case is on appeal), Section 301 of that same act (the issue is now being litigated), and now Section 338. asserted
issue → issue → act
Courts should continue to reject these power grabs. asserted
Courts → continue → grabs
I hope that will soon change. asserted
that → hope → ?
And, when it does, the plaintiffs should make sure to make major questions and nondelegation arguments, in addition to other points. asserted
plaintiffs → do → points
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